deb only uses Package.gz which not all offical repositories contain

[BigMichi1]

How are you running Renovate?

Self-hosted Renovate

If you're self-hosting Renovate, tell us which platform (GitHub, GitLab, etc) and which version of Renovate.

GitLab

Please tell us more about your question or problem

i have in my Dockerfile

  # renovate: datasource=deb depName=firefox packageName=firefox registryUrl=https://packages.mozilla.org/apt?suite=mozilla&components=main&binaryArch=amd64 versioning=loose
  ARG FIREFOX_VERSION=143.0.3

and using the regex manager to update the version

  "customManagers": [
    {
      "customType": "regex",
      "description": "Update dependencies with renovate comments in Dockerfile",
      "managerFilePatterns": [
        "/(^|/)Dockerfile$/",
        "/(^|/)Dockerfile\\.[^/]*$/"
      ],
      "matchStrings": [
        "#\\s*renovate:\\s*datasource=(?<datasource>\\S+)\\s+depName=(?<depName>\\S+)(?:\\s+packageName=(?<packageName>\\S+))?(?:\\s+registryUrl=(?<registryUrl>\\S+))?(?:\\s+versioning=(?<versioning>\\S+))?\\s*\\nARG\\s+\\w+\\s*=\\s*(?<currentValue>\\S+)"
      ],
      "versioningTemplate": "{{#if versioning}}{{{versioning}}}{{else}}semver{{/if}}"
    }
  ],

the Problem i currently have and looks like can not work around by confguring renovate is that the repository only contains a Package file but renovate actually requests Package.gz tools like apt and aptitude when running in debug mode show that the correctly use Package

can renovate pls also use the Package file if Package.gz does not exist

Logs (if relevant)

Logs

DEBUG: Skipping component due to an error (repository=renovate/renovate-image)
       "componentUrl": "https://packages.mozilla.org/apt/dists/mozilla/main/binary-amd64",
       "error": {
         "name": "HTTPError",
         "code": "ERR_NON_2XX_3XX_RESPONSE",
         "timings": {
           "start": 1761160445076,
           "socket": 1761160445076,
           "lookup": 1761160445088,
           "connect": 1761160445093,
           "secureConnect": 1761160445110,
           "upload": 1761160445110,
           "response": 1761160445302,
           "end": 1761160445304,
           "phases": {
             "wait": 0,
             "dns": 12,
             "tcp": 5,
             "tls": 17,
             "request": 0,
             "firstByte": 192,
             "download": 2,
             "total": 228
           }
         },
         "message": "Response code 404 (Not Found)",
         "stack": "HTTPError: Response code 404 (Not Found)\n    at Request._onResponseBase (/builds/renovate/renovate/node_modules/got/dist/source/core/index.js:913:31)\n    at Request._onResponse (/builds/renovate/renovate/node_modules/got/dist/source/core/index.js:948:24)\n    at ClientRequest.<anonymous> (/builds/renovate/renovate/node_modules/got/dist/source/core/index.js:962:23)\n    at Object.onceWrapper (node:events:634:26)\n    at ClientRequest.emit (node:events:531:35)\n    at ClientRequest.emit (node:domain:489:12)\n    at ClientRequest.origin.emit (/builds/renovate/renovate/node_modules/@szmarczak/http-timer/dist/source/index.js:43:20)\n    at HTTPParser.parserOnIncomingClient (node:_http_client:716:27)\n    at HTTPParser.parserOnHeadersComplete (node:_http_common:121:17)\n    at TLSSocket.socketOnData (node:_http_client:558:22)\n    at TLSSocket.emit (node:events:519:28)\n    at TLSSocket.emit (node:domain:489:12)\n    at addChunk (node:internal/streams/readable:561:12)\n    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)\n    at TLSSocket.Readable.push (node:internal/streams/readable:392:5)\n    at TLSWrap.onStreamRead (node:internal/stream_base_commons:189:23)",
         "options": {
           "headers": {
             "user-agent": "RenovateBot/41.157.1 (https://github.com/renovatebot/renovate)",
             "accept-encoding": "gzip, deflate, br"
           },
           "url": "https://packages.mozilla.org/apt/dists/mozilla/main/binary-amd64/Packages.gz",
           "hostType": "deb",
           "username": "",
           "password": "",
           "method": "GET",
           "http2": false
         },
         "response": {
           "statusCode": 404,
           "statusMessage": "Not Found",
           "body": "Requested entity was not found.",
           "headers": {
             "server": "nginx",
             "date": "Wed, 22 Oct 2025 19:14:05 GMT",
             "content-type": "text/plain; charset=utf-8",
             "content-length": "31",
             "x-content-type-options": "nosniff",
             "x-frame-options": "SAMEORIGIN",
             "x-xss-protection": "0",
             "via": "1.1 google",
             "alt-svc": "h3=\":443\"; ma=2592000,h3-29=\":443\"; ma=2592000"
           },
           "httpVersion": "1.1",
           "retryCount": 0
         }
       }
DEBUG: Failed to look up deb package firefox (repository=renovate/renovate-image, packageFile=Dockerfile, dependency=firefox)

[mocknen]

I've also encountered this issue with Debian/stable-backports.
Since it serves Packages.xz instead of Packages.gz, Renovate can't find it.

The problematic part appears to be hard-coded in getPackageUrl.

renovate/lib/modules/datasource/deb/url.ts

Lines 150 to 166 in 0744b7c

	/**
	* Constructs a URL for accessing the Packages.gz file for a specific component, release, and architecture.
	*
	* @param baseUrl - The base URL of the repository.
	* @param release - The release name or codename (e.g., 'buster', 'bullseye').
	* @param component - The component name (e.g., 'main', 'contrib', 'non-free').
	* @param arch - The architecture name (e.g., 'amd64', 'i386').
	* @returns The complete URL to the Packages.gz file.
	*/
	export function getPackageUrl(
	baseUrl: string,
	release: string,
	component: string,
	arch: string,
	): string {
	return `${getComponentUrl(baseUrl, release, component, arch)}/Packages.gz`;
	}

[RahulGautamSingh]

Issue created: #44330

PRs welcome